Electrochemical insertion of Sr2+ ions onto nano δ-MnO2 particles

Prasant Kumar Nayak, N. Munichandraiah

Research output: Contribution to journalArticlepeer-review


Manganese dioxide is known to be an important electroactive material for supercapacitors. Generally, δ-MnO2 is subjected to electrochemical characterization studies in aqueous electrolytes of Na2SO4. It exhibits capacitance behaviour in the potential range between 0 and 1.0 V vs. SCE (saturated calomel electrode). In the present study, it is shown that δ-MnO2 exhibits capacitance behaviour in Sr(NO3)2 electrolytes also. The suitable potential range in this electrolyte is also found to be 0-1.0 V. Specific capacitance measured in Sr(NO3)2 electrolyte is 192 F g- 1. X-ray photoelectron spectroscopy data confirm that Sr2+ ions get inserted onto δ-MnO2 nanoparticles.

Original languageEnglish
Pages (from-to)1319-1321
Number of pages3
JournalMaterials Letters
Issue number11
StatePublished - 15 Jun 2010
Externally publishedYes


  • Nanomaterials
  • Porosity
  • Specific capacitance


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